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1. The equation: 78 + 45 = 45 + 78 demonstrates which property?
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2. What is the additive identity element in mathematics?
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3. Which equation shows the Associative Property of Addition?
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4. Does the commutative property work for subtraction?
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5. Evaluate using compensation: 67 + 29 =
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6. Evaluate using compensation: 85 - 39 =
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7. Evaluate: 48,250 + 36,920 =
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8. Evaluate: 70,000 - 34,680 =
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9. In the bar model equation: x + 4,500 = 12,000, what is the value of x?
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10. In the bar model equation: y - 8,200 = 6,800, what is the value of y?
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11. A bakery produced 14,500 loaves in the morning and 16,800 in the afternoon. If 25,000 loaves were sold, how many loaves remain?
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12. In the equation: 45,000 - m = 28,000, what is the value of m?
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13. What is the value of 1,000,000 - 345,000?
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14. A charity had 60,000 LE. It spent 24,500 LE on food and 18,500 LE on clothing. How much money is left?
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15. Which property allows grouping: (34 + 66) + 48 = 100 + 48 = 148?
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16. In the subtraction 90,000 - 42,150, what does the hundred thousands digit become?
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17. Evaluate: 254,000 + 186,000 =
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18. Evaluate: 100,000 - 1 =
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19. If Minuend = 95,000 and Subtrahend = 42,000, what is the Difference?
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20. Solve for variable c: c + 15,200 = 30,000